Coupling for the pipes of railroad-cars.



'ATBNTED MAR. 22. 1904. a. WITZBNMANN. 'l GOUPLING Foa THB PIPBS 0FRAILROAD GARS.

l Prummel rrLnn nno. as, nos. vlo nonni.; *s sums-usm z. h

W/TN 66656 /NVEN fof? No. 755,204. PATENTBD MAR. zz, 1904.

, Y B. WITZBNMANN.v w CUUPLING PoR THE PIPBS OP RAILROAD CARS,

` 'APPLICATION FILED DBO. 29, 1903. Y

IODIIL. f Y y 3 SHEETS-SHEET 3.

l MLA/@ZAL UNITED f STATES Patented march 22, 1904,.`

PATENT OFFICE.

CQUFLHEG FOR THE PIPES OF RAlLP-OAD-CARS.

srncrrrca'rroN forming part of Lemie Patent Np. 755,204, dated Maren 22,1904.

Applicatie: ed December 29, 1903. Serial No. 187,038. (No model.)

` 'To all whom, if may concern:

Be it known that I, Burr. YVIT'ZENMANN, manufacturer, a subject of theGrand Duke or' Baden, residing at 48 Holzgartenstrasse,

Pforzheim, Germany, have invented certain new and useful Improvements inCouplings for the Pipes of Railroad-Cars, of which the following is aspecification.

My invention relates to a coupling device IO for connecting the pipesemployed on railroadcars, more particularly f or the b1alte,lieating,cooling, and water pipes, the electric-conductor or gas pipes, Snc. Forconnect-ing the pipes a special coupling device comprising a I 5 specialmetallic spiral hose is employed. Me-

tallic spiral hose is stronger than the ordinary rubber hose hitherto inuse. Itcan withstand a higher internal pressure anda stronger pull orgreater distortion and, furthermore, oders ahigh guaranty againstobstructions and the likeioccurring in the interior of the hose.

The essential feature of my invention consists in the combination of atreble hose with special coupling members. The hose consists of an innermetallic hose, an intermediate rubber or like hose, andan externalmetallic hose.

At one end of the inner metallic hose a conical v collar is provided,pressing the intermediate rubber hose against the inner wall of a.collar applied to the external metallic hose, wl1ereby a tight joint ismade between the three hoses'lying one within the other. ii'ith vthetreble hose therev is combined a coupling de- Vice consisting of twomembers which on coupling taking place press a washer lying between themagainst the end of the hose, so making a close joint.

My invention is illustrated in the accompa- 'nying drawings, in whichiFigure l shows in elevation and part section n portion of a treble hosewith coupling device. Fig. 2 is an end view thereof. Fig. 3 is a viewcorresponding to Fig. l, showing a modilication of the coupling device.F ig. 4 is an end view of the same- Fig. 5 shows in elevation portionsor' caisthe pipes of which are coupled by the new device.

VAs the drawings show, according to both formsl of construction aconical collar 'i is apon the end of the outer hose,`against the innerplied to the end ,of the inner metallic spiral lv *l hose a', and thiscollar presses againsttue inner wall of the rubber or other elasticintermediate hose According to the construction shown in l Figs. l and2, a screw-collar d is pushed over 5S theexternal metallic hose c, andover this collar rl. grips a screw-sleeve g, having a hexagonal portionf.- Between the collar rl and sleeve g--that is to say, in front of theconical collar -is located a washer which on the hose being coupled upis compressed, and thus eiects a tight joint at the end of the hose. Theconical collar t' is preferablyv furnished with a iiange j to preyentthe rubber .washer or packing from being pressed in too far, andv ythereby being crushed.

The' construction shown in Figs. 3 and 4 difters From that justdescribed only in the coupling dev'ice,eonsisting of two flanged'members o w, connected by bolts fr, the one member, w, being secured tothe outer metallic hose c, while the other, c, grips over a. pro jectingportion' of the member w. Between the two members o w, just as in thecase of the first described arrangement, there is located a washer z,which on coupling taking place is compressed, so effecting a closejoint.

Fig. 5 shows the brake or heating pipes of a car connected by the newcoupling-hose.

Har ing thus described my invention, what I claim as new, and desire tosecure by Letters Patent, isi 1. A coupling crevice for 'connecting -thepipes of railroad-cars and the like, comprising in combination, a treblehose consisting of an inner metallic hose, an intermediate elastic hoseand an outer metallic bose, a conical collar on the end of the innerhose between the same and the elastic hose, a coupling member wall ofwhich member' the conical collar presses the elastic hose, a secondcoupling member adjustably secured to the-first said coupling member anda washer located between the abutting faces of the said couplingmembers, substantially as described. i 2. A coupling deviceA forconnecting the pipes of railroad-cars and the like, comprising incombination, a treble hose consisting of an innerrnetallic hose, anintermediate elastic hose and an outer metallic hose, a coniml .flangedcollar'on the. end of the inner hose between Vthe same and the elasticbose, a coupling mem-ber on the end of the outer hose,

against the inner wall of which member the conical collar presses theelastic hose, a second lcouplingmember adjustably secured to the firstsaid coupling member and a Washer located between the abutting facesofthe said coupling members, substantially as described.

3. A coupling device for connecting the pipes of railroad-cars and thelike, comprising in combination, a treble liose consisting of an innermetallic hose, an intermediate elastic yhose, andan outer metallic hose,aconical col- Klar on the end of the inner hose between the end of thesaine and the elastic bose, a screwcollar on the end of tlie outer hose,against the inner wall of which collar the conical collar presses theelastic hose, a sleeve having a hexagonal projection screwed over thesaid outer collar and a washer located between the abutting faces of tbeouter collar and sleeve, substantially as described. l

4. A coupling device for connecting the pipes of railroad-ears and tbelike, oniprising in combination, a treble hose consisting of an innermetallic hose, an intermediate elastic hose, and an outer metallic hose,a conical collar on the end of the inner hose bctwcen the end of thesame and tbe elastic hose, a anged coupling member on the end of theouter hose, against the inner wall of which collar the conical collarpresses the elastic hose, a scccnd anged coupling member bolted to thefirst, and a washer located between the abutting faces of tbe'said twocoupling vmembers,`sub

stantially asvdcscribed,

In witness whereof I bave hereunto signed my name, this 12th day ofDecember, 1903, in the presence of two subscribing Witnesses.

Witnesses:

B. VITZENMANN, ERNST ENTERNNE.

